Cylindrical Coordinate System Constraints NX Advanced Simulation (NX Nastran)

[Recon1775]

I'm trying to figure out a constraint setup for a clock spring where I pull on the free end and move the spring around as if it were winding.
So I have a cylindrical coordinate system setup where I enforce a rotation displacement using DOF5 (T in degrees) of the cylindrical coordinate system.
But I also what the free end of the spring to remain at a specific distance from the rotation point.
When I attempt to apply a DOF1 (R in mm) the constraint appears to only hold in the direction the R axis is facing at the start of the analysis.
I assumed the constraint would have held as a normal direction around the cylindrical coordinate system as the end of the spring rotated about the center.

Am I mistaken? Or thinking about this incorrectly?

 

[Recon1775]

I think I figured it out. I applied an RBE2 from a center node to the free end of the spring and then applied the enforced rotation constraint. The RBE2 restrains the end from moving in or out board, but allows it to rotate about the center for the spring.